Feed-water heater and purifier



(No Model.) 7 I I F. P. LANDIS. FEED WATER HEATER AND PURIFIER.

No. 508,174. Patented NOV. 7, 1893.

W/(IVESSES: lA/VE/VTOR gm fi/fiw ATTORNEY.

- f UNITED STATES- PATE T OFFICE.

FRANK F. LANDIS, OF wA NEs'BoRoUeH, PENNSYLVANIA.

FEED-WATER HEATER AND PURIFIER.

SPECIFICATION forming part of Letterslatent No. 508,174, dated November 7, 1893.

' Application filed March 9, 1893;. Serial No. 465,305. (No model.)

To all whom it may concern:

Be it known that I, FRANK F. LANDIs, a citizen of the United States, residing at Wayuesborough, in the county of Franklin and State of Pennsylvania, have invented certain new and useful Improvements in Feed Water Heaters and Purifiers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. This invention relates to devices for heat- 1ng and purifying the feed water within the shell of the boiler before it is allowed to pass into contact with the heated furnace plates and tubes which convert it into steam.

Thisinvention consists .in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings: Figure 1 is alongitudinal section through a boiler constructed according to'this invention; and Fig. 2 is a crosssection through the same, taken on the line 00 w in Fig. 1.

A is the shell of the boiler; A is its firebox; and a are the heating tubes, connecting the fire-box with the smoke-box a B are precipitating and collecting pans arranged in a substantially horizontal series in the steam space of the boiler above the heat mg tubes. Means for supporting the pans are provided, and may be of any approved construction which will permit the pans to be moved about when desired. Angle irons b are shown riveted to the shell of the boiler as one means for supporting the pans. As an equivalent means of support, the pans may have feet b, as indicated in Fig. 1, adapted to rest on the upper tubes; and many other equivalent forms of supporting devices may be used.

G is a hand-hole in the boiler shell. This hole is provided with a cover of any approved construction. The hand-hole is arranged so that, when the cover is removed, the pans can be removed through it, and replaced, one

by one. The pans near the fire-box and smoke-box are slid along their supports until opposite the handhole, before they are withdrawn.

traction-engine boiler shown and described in the patent issued to me on January 30, 1883, N0. 27 1,47 7, and the said chamber then forms their means of support. When used in a traction-engine boiler, the pans may however be supported as shown in the drawings, audthe pans themselves may form a substitute for the displacing chamber shown in the above-mentioned patent. The pans nearest the smokebox are then preferably made of greater depth than those nearest the fire-box. The water will then, in a great measure, be prevented from uncovering the crown-sheet of the fireboxwhen the engineisgoingdownhill. When the traction engine boiler is on level ground the water is above the crown sheet of the boiler fire-boxand below the top of the shallowest pan. When the engine is proceeding down a hill the water gravitates to the front end of the boiler and tendsto uncover the crown sheet. The deep'pans occupy considerable space at the front end of the boiler and partially prevent this movement of the water, so that when the water level comes about parallel with the line of the tops of the pans there will still be sufficient water retained over the crown sheet to prevent it from being overheated. Each pan is made of thin sheet metal and ribs or lugs c are preferably provided on the sides of the pans to keep them at a little distance apart. The pans are prevented from lifting out of place by the curved top portion of the boiler shell, or a stop bar 0' may be secured to the shell for that purpose, as shown atthe right hand in Fig. 2.

D is the feed-water inlet pipe provided with a check valve d'of approved construction; and d is a blow-off valve, the use of which will be more fully described hereinafter.

E are branch pipes connected to the pipe D between the two valves and projecting within the shell of the boiler. Two branch pipes e are connected to each pipe E inside the boiler, and are arranged horizontally over the pans. The pipes e are provided with nozzles e over the pans. The area of each nozzle aperture is very small, and each pan is adapted to hold a considerable body of water. The proportions of the parts are preferably so arranged that when the feedpump is at work each pan will be filled in about fifteen or twenty minutes for the boiler of a tractionengine, as boilers of this class usually work at a steam pressure of about four atmospheres.

The feed-water is injected into each pan, each pan receiving substantially the same amount in the same time. The feed-water descends to the bottom of each pan and is heated nearly to the temperature corresponding to the pressure of the steam in the boiler before it flows over the tops of the pans. The impurities in the water are precipitated in each pan as soon as the temperature of precipitation is reached, and the water is practically pure before it flows'over the top edges of the pans. The water in the pans is still and practically motionless except where the small jet of feed water impinges on it,'a nd thepreeipitation of the impurities'and their; collection in thebottoms of the pans aretherebygreatly facilitated.

hole-andare cleaned out.

faces-are kept freefrom scale and dirt.

the 'boi'ler is at work.

might collect and choke u p the nozzles.

drawings.

What =r claim is the said pans in the steam space of the boiler and permitting their removal through the said hand-hole, substantially as set forth.

3. The combination, witha boiler provided with a fire-box, asmoke-boxand heating'tubes substantially as set forthg-o'f aseries of pans -for receiving the feedwater, supported in the steam space above the tubes, th-epans'near VVlren the boiler has been-at work -forsol'iie timethe pans are removed through thehand f scribed and shown. he impurities of the water are collectedf by the pans, and the steam prod ucing snr-j The blow-sl t valve 62" is opened'oceasiona-l ly while I This permitsth'esteam topass back through the nozzles and clear them and the-pipes o'f any'solid matter waist [the smoke-box being 'of greater depth than those near the fireboaszfbstantiall as del 4. The combination, with the shell of 'a boiler, and a series'ot pans sup orted in its steam space; of a feed wate-r pipe provided with a separate nozzleover-ea-ch 'ipanthe'said n-otzles having very small discharge openin-g's and operating to supply the pans slowly and uniformly, and-a ldlo-w o'ff valve secured to the feed-Waterpipe, whereby solid matter The device is applicable to many other formswf boi-le'r besides that shown in the accumnlatihg'in the said pipe'tjr'noz'zles may be blown outby "the steam, substantially as set forth.

{En testimotiywhereot l affiirnrysi'gnature in presence of'twowi-tnesses. I V

FRANK F. 'L'ANDIS. Witnesses:

ALF. N. RUSSELL, CAL. KROME. 

